Which statement about influenza is true?

Which statement about influenza is true?

• A. It is a respiratory disease.
• B. It is a digestive disease.
• C. It is caused exclusively by bacteria.
• D. It is a cardiovascular disease.

Answer: (A)

Influenza is a respiratory viral infection. The illness is caused by influenza viruses that primarily infect the cells lining the respiratory tract, leading to symptoms such as fever, cough, sore throat, runny nose, and body aches. It spreads mainly through respiratory droplets and is categorized by effects on the airways rather than the digestive system, heart, or blood vessels. This is why the statement describing influenza as a respiratory disease is true, while the others—being a digestive disease, being caused exclusively by bacteria, or being a cardiovascular disease—do not fit the nature of influenza.

Influenza is a respiratory viral infection. The illness is caused by influenza viruses that primarily infect the cells lining the respiratory tract, leading to symptoms such as fever, cough, sore throat, runny nose, and body aches. It spreads mainly through respiratory droplets and is categorized by effects on the airways rather than the digestive system, heart, or blood vessels. This is why the statement describing influenza as a respiratory disease is true, while the others—being a digestive disease, being caused exclusively by bacteria, or being a cardiovascular disease—do not fit the nature of influenza.